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GDG develops monopile soil structure models


Gavin and Doherty Geosolutions (GDG) has been working with GE Renewable Energy (GE) to develop XL Monopile soil-structure interaction models.

Designed to support GE’s development of optimised foundation designs for the new Haliade-X 12MW turbine, the foundation design study has included investigation of multiple sites around the world with a range of water depths and different ground conditions.

Working with French engineering from Mareal, GDG has developed site-specific studies to prove that the Haliade-X is well-suited and competitive for monopile solution over a wide range of site conditions.

The soil-structure interaction analysis included detailed assessment of the geotechnical and structural capacity of the monopiles, including dynamic interaction and fatigue assessment.

According to GDG, a critical aspect of the analysis was the non-linear finite element modelling undertaken to determine the response of the XL-monopiles to the turbine loading under a range of different operating conditions.

The refined soil-structure interaction approach facilitates the use of calibrated site specific soil reaction curves to significantly reduce the steel tonnages of each foundation, the firm said. 

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